Hi rzande1,
I do not know the whole story that relvolves around this girl, but from what I have read in what you wrote I am glad that you decided to give up on her, she didn't really seem like the one who was best for a life-long commitment. I am glad that you have been able to realize what she is really like before you made some serious mistakes with her.

As for going out and meeting new people, I am not sure on the surrounding in your area, so I suggest to go soe places where you have interests, such as library, mall, gatherings, bars, clubs, or even try meeting someone through mutual friends